#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     | Website:  https://openfoam.org
#   \\  /    A nd           | Copyright (C) 2011-2020 OpenFOAM Foundation
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM is free software: you can redistribute it and/or modify it
#     under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
#
#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
#     for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     wmakeCheckPwd
#
# Usage
#     wmakeCheckPwd <dir>
#
# Description
#     Check that the current working directory is the directory <dir>
#
#-------------------------------------------------------------------------------
Script=${0##*/}

unset quietOpt

usage() {
    cat<<USAGE

Usage: $Script [OPTION] [dir]

options:
  -quiet | -q   suppress all normal output
  -help  | -h   print the usage

  Check that the current working directory is the directory <dir>

  Exit status 0 when the directories are identical
  Exit status 1 on error

USAGE
}

error() {
    [ "$quietOpt" = true ] && exit 1
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    usage
    exit 1
}


#------------------------------------------------------------------------------
# Parse arguments and options
#------------------------------------------------------------------------------

while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help)
        usage && exit 0
        ;;
    -q | -quiet)
        quietOpt=true
        shift
        ;;
    -*)
        error "unknown option: '$*'"
        ;;
    *)
        break
        ;;
    esac
done


[ "$#" -eq 1 ] || error

# Set dirName to <dir>
dirName="$1"

# Simple check against $PWD
[ "$PWD" = "$dirName" ] && exit 0

# Check existence of <dir>
[ -d "$dirName" ] || {
    [ "$quietOpt" = true ] || {
        echo "$Script error: Directory does not exist $dirName"
    }
    exit 1
}

# Use /bin/pwd to get the absolute path (could be linked)
thisDir=$(/bin/pwd)
target=$(cd "$dirName" 2>/dev/null && /bin/pwd)

# Return 0 if this directory is <dir>
[ "$thisDir" = "$target" ] && exit 0

# This directory is not <dir>
[ "$quietOpt" = true ] || {
    echo "$Script error: Current directory is not $dirName"
}
exit 1


#------------------------------------------------------------------------------
# Cleanup local variables and functions
#------------------------------------------------------------------------------

unset Script usage error


#------------------------------------------------------------------------------
